Primera Angostura is a sound of the Strait of Magellan

Strait of Magellan

The Strait of Magellan comprises a navigable sea route immediately south of mainland South America and north of Tierra del Fuego...

 in Tierra del Fuego

Tierra del Fuego

Tierra del Fuego is an archipelago off the southernmost tip of the South American mainland, across the Strait of Magellan. The archipelago consists of a main island Isla Grande de Tierra del Fuego divided between Chile and Argentina with an area of , and a group of smaller islands including Cape...

. It is the narrowest part of the Strait between the island and the continent. The sound was named Primera Angostura (Spanish for First Narrows) as it was the first narrows of the strait that ships met when sailing through the strait from east to west.

The ferry company Transbordadora Austral Broom S.A.

Transbordadora Austral Broom S.A.

Transbordadora Austral Broom S.A is a Chilean water transportation company.It has been navigating across the Strait of Magellan, and the fjords and channels of Patagonia since 1968, connecting Tierra del Fuego, Navarino Island and Cape Horn....

operates across the narrows.